Frost in your attic space is a sign that warm humid air is somehow getting into your attic space.
Frost in attic space.
When warm air from inside the house escapes traveling up through the bypasses the moisture condenses on the roof boards and rafters where the frost can form.
When moisture gets into the attic it condenses on the roof sheathing in the form of frost.
Attics with pull down attic stairs should have attic stair insulation covers installed.
Water in your attic can damage wood.
To start frost accumulates when moisture laden air from the house gets into the attic.
Though attics are typically hot and dry a leaky roof or pipe condensation or severe weather can cause water to enter your attic.
Frost accumulates in attics when moisture laden air from the house gets up there when it s cold.
When the outside temperature rises again the frost thaws water collects and can leak into.
In order to eliminate frost build up in the attic space we have to understand what causes it in the first place.
This post is largely a re blog of my last post on attic frost but that was from 2013 and it s time for a reminder about all of this.
Since our minnesota winters are usually dry the only other source of humid air is your living space.
That s about it pretty simple.
The final step is attic ventilation.
When the moisture gets into the attic it condenses on the roof.
I ve blogged about attic air leaks many times and i ve shared photos of attic air leaks.
How to dry out an attic.
Check out my post on moldy attics for some.
When a warm sunny day arrives after a long cold stretch and it seems like you have a roof leak when there isn t a cloud in the sky it s probably attic icing otherwise known as ice dams or ice damming and the surprising thing is that it s very unlikely that the roof covering itself is the problem.
During winter conditions attic frost is a problem associated with attic bypasses.
Frost gets into the attic from air leaks or attic bypasses.
Why is there ice in my roof.
That s about it pretty simple.